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Section 11 • Alarms, Trips, Status Information & Troubleshooting
Blower Package PLC Operation Manual •Vilter/Emerson • 35391BLP
Troubleshooting
IF THE BLOWER(S) WILL NOT START
In order to initiate a start at the blower package, make sure all permissives to initiate a start are met.
To initiate a start, the following conditions must be met:
• Control Power is ON (Emergency Stop button is not pressed and Master Control Relay is energized, indicated by
pilot light on front of panel)
• No Active Trips
If a start has been initiated and the blower has not started, it is in standby mode. When in standby mode, the status
banner will indicate the condition that is preventing the blower from starting.
IF CONTROL POWER WILL NOT TURN ON
If unable to turn on control power/reset an emergency stop, check the following conditions:
To energize the Master Control Relay, the following conditions must be met:
• Blower PLC Panel must be supplied with 120VAC power.
• “Master Power” Selector Switch must be ON
• Local Emergency Stop pushbutton (mounted on PLC enclosure door) must be pulled out.
• DC power supplies must be powered up and functional, “DC OK” Relay must be energized.
• CompactLogix processor must be powered up and functional, “PLC OK” Output must be ON.
• Optional/External Emergency Stop Devices are not tripped.
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